81444985 (number)

81444985 is an odd 8-digits composite number following 81444984 and preceding 81444986. In scientific notation, it is written as 8.1444985 × 10^7. The sum of its digits is 43. It has a total of 3 prime factors and 8 positive divisors. There are 64914480 positive integers (up to 81444985) that are relatively prime to 81444985.

Interesting facts

Basic properties

Name

Name eighty-one million four hundred forty-four thousand nine hundred eighty-five

Notation

Scientific notation 8.1444985 × 10^7
Engineering notation 8.1444985 × 10^6

Prime Factorization of 81444985

Prime Factorization 5 × 271 × 60107

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 81444985
Product of the distinct prime numbers

The prime factorization of 81444985 is 5 × 271 × 60107. Since it has a total of 3 prime factors.

Most popular turbo-numbers

3, 2, 33, 80, 313, 186, 7926, 3910, 60479, 19845, 804037, 598131, 6863428, 3528352, 26103613, 92988708, 48744730, 554287349, 5544693310, 8097793759

Basic calculations (n = 81444985)

Multiplication

n×y
n×2 162889970
n×3 244334955
n×4 325779940
n×5 407224925

Division

n÷y
n÷2 40722492.5
n÷3 27148328.333333
n÷3 20361246.25
n÷5 16288997

Exponentiation

ny
n2 6633285581650225
n3 5.4024784469822E+23
n4 4.4000477607729E+31
n5 3.5836182387543E+39

Nth Root

y√n
2√n 9024.6875292167
3√n 433.46574487413
4√n 94.998355402695
5√n 38.209633279805

Divisors of 81444985

1, 5, 271, 1355, 60107, 300535, 16288997, 81444985

8 divisors

τ Total Divisors 8
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81444984
Sum of the proper positive divisors of n
A Arithmetic Mean 0.125
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 1
Returns the nth root of the product of n divisors
H Harmonic Mean 8
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81444985 can be divided by 8 positive divisors. The sum of these divisors (counting 81444985) is 1, the average is 0.125.

Base conversion 81444985

Base System Value
2 Binary 100110110101100000001111001
3 Ternary 12200020211111221
4 Quaternary 10312230001321
5 Quinary 131322214420
6 Senary 12025352041
8 Octal 466540171
10 Decimal 81444985
12 Duodecimal 23338621
16 Hexadecimal 4dac079
20 Vigesimal 1590c95
36 Base36 1chncp

Cryptographic Hash Functions

md5 5cc554f0c36c4fa7c07b2d6778f275f8
sha1 1d308d9b73ddc7f623242f42992798ceac106130
sha256 abf3853e126e818bcc86d28a66be4311675495a00eef01d527e6ad6cef265845
sha512 17ea5191f4d6479efc0dc02a0e57bfaae22a4d0696a2fae29c13723c47620fce59b921d42f3df8efbf459aae1318d3f1737c1188adf3d038fa2e166eaf55b74b
ripemd-160 f40ed97a0b99ecd66217d954dd5e329222277d42

81444985 as geometric shapes

Circle

Radius = n
Diameter 162889970
Circumference 511733933.09546
Area 2.0839081252475E+16

Sphere

Radius = n
Volume 2.2629848800289E+24
Surface area 8.3356325009902E+16
Circumference 511733933.09546

Square

Length = n
Perimeter 325779940
Area 6633285581650225
Diagonal 115180602.37427

Cube

Length = n
Surface area 39799713489901350
Volume 5.4024784469822E+23
Space diagonal 141066852.04169

Equilateral Triangle

Length = n
Perimeter 244334955
Area 2.8722969121331E+15
Altitude 70533426.020843

Triangular Pyramid

Length = n
Surface area 2.8722969121331E+15
Volume 6.3668819084588E+22
Height 38393534.124758